Boxers who have a nemesis?

[Nash out]

Someone who they are better than overall, have a better career than, but get bested by when they fight.

Barrera vs Junior Jones (Two fights both won by Jones)

Pacquiao Vs Marquez (4 fights 2-1-1 Pacquiao, but generally scored 3/4 wins for Marquez)

Lomachenco vs Salido (Points win Salido - Aggression and brilliant body work prevailed in a fight magnificently refereed by Laurence Cole. Any more for the list?

[Sir_Didymus]

Kell Brook vs Ernie Smith. 3 fights that went the distance in debatable close decisions for Brook.